The Rainbooms are struck down by the commanding voice of the Sirens. Twilight's microphone rolled over to Sunset Shimmer as she called out, "Sunset, we need you." Shimmer looked hesitant but just as she started deciding whether to help or not, Aria flew down and used her voice to destroy the girls' instruments. Defeated Adagio made one last attack to knock them unconscious.
With the concert over the crowd cheered before Aria said, "so what are we gonna do with them?" Sonata was about to chime in before Twilight stepped up.
"You may have beaten The Great and Powerful Trixie today, but Trixie doesn't give up so easily!" Adagio seemed surprised for a moment before Aria leans over to Trixie's ear and sings softly causing her to fall asleep. Adagio only smiled, "Gather her, and the Rainbooms. I have the perfect idea for them back at our home base"
Twilight felt like she'd been hit in the head as she was awoken by Trixie's voice. "Untie Trixie right now! Trixie does not deserve to be put on the same level as the Rainbombed!" Twilight opened her eyes seeing all the others as she saw herself, her friends, and Trixie were all tied at the wrists to keep them from moving. Soon the Sirens all stepped in Adagio grinning down upon the girls.
"It seems they're waking up, I suppose we can let them out of Time out!" Twilight was confused as all girls focused their attention on her.
"What's going on?" Trixie demanded from them as Rainbow Dash chimed in.
"Yeah, let us go you bitches!" She cried though it was clear that Adagio didn't care much for interruptions.
"Quiet!" Adagio said loud but firm. "The answer my "foals", is simple. You contain Equestrian magic, power that we will drain from you until we are strong enough to go back and get revenge for being banished to this wretched world!"
"You'll never get away with this Adagio! As long as we're together our friendship will always succeed" Twilight cried out inspiring the girls but Adagio only grinned.
"I think it's time to show these girls their place, don't you agree?" she turned to the other Sirens as they nodded before they all began to glow. Their magic radiated through the room, The girls soon felt their bindings loosen but their clothes became baggy and heavy. Each girl dwindling now as the Sirens soon stopped glowing except Adagio. The girls all reduced to half their size, Twilight however kept getting smaller until she was only a foot tall.
Adagio landed and all the girls were panicked covering themselves with their baggy shirts, Fluttershy however saw past her own fear and approached Twilight. Adagio just grinned down at Twilight who stared up at her like a goddess before being picked up softly by Fluttershy. She held Twilight to her chest, as Twilight hugged tightly to it somewhat afraid of falling but for some reason it was comforting her.
Adagio turned to Aria and Sonata saying, "Aria "pamper" the girls, I'll keep watch" Sonata giggled as she bounced a little while Aria just sighed.
"Why do I have be on padding duty? Sonata would be better, she's as smart as a three year old and has experience being treated as such" Aria's protest only upset Sonata.
"Oh yeah? Well... You should..." But Sonata got cut off as Adagio was already annoyed with them.
"BOTH of you will change the Rainbooms, or you'll both be in diapers!" She said angrily at them.
"Fine, you didn't have to yell" Aria said as she grabbed Pinkie's hand, pulling out our of the room. Sonata went for Trixie who only protest.
"Trixie will not endure such humiliation as wearing a... diaper" she said with a disgust look on her face. Adagio already annoyed found a bit of humor in Trixie's temper.
"That's alright dear, if you don't want to wear a diaper, you can always join Twilight in the doll house!" Adagio said making Trixie gulp in fear.
"On second thought, perhaps Trixie can learn to...endure a new sense of fashion." She let herself be picked up by Sonata as she carried her out to the changing tables. As Sonata got there, Aria was already having trouble getting a diaper on Pinkie as she was hyperactive.
"Hold still you pink menace" she cried down at her, trying to hold her legs still as she changed her. Sonata could only giggle as Aria said, "Don't laugh, what do you know about changing diapers?"
"More than you" she teased, "Watch I'll teach you" Sonata hummed as she undressed Trixie who covered her chest embarrassed before Sonata grabbed a wet wipe. "First you have to clean them" She said using the wipe on Trixie's crotch to make sure she was thoroughly cleaned. As the cold wipe touched her Trixie gasped and quivered. She was going to object to the torment but Aria walked up the two "giantesses" imposing her with their size so Trixie stayed quiet.
"Next you have to air dry them, quickly but softly." she said before lightly blowing on to Trixie's crotch making it quiver from the action. Sonata then took baby powder and splashed it on before strapping the diaper on her as she said, "Just a dash of powder and a one, two, and your done!" Sonata smiled as Trixie sat up in her diaper.
"Wow Sonata, you're actually pretty good at this" Aria commented to her which made Sonata giggle happily. "It must be all the practice you get from wearing diapers yourself" she said making Sonata puff her cheeks in anger. She stayed quiet however and put her down in the play pen before going back to get another girl.
Aria turned back to Pinkie "so wet, blow, diaper, powder " she shrugged, "if she can do it, it can't be that hard" she said before using the wet wipe to clean Pinkie who only giggled.
"Hey, that tickles" she said up to Aria but she didn't listen. She then leaned down and blew lightly onto her before suddenly Pinkie began to urinate getting it on Aria's face then shirt as she jerked back. "Looks like I really do need a diapy"
"Ah, you little...!" Aria cried wanting to spank Pinkie but Sonata had come back with Rainbow Dash, both of them laughing at her. Aria just tightened her fists, "Whatever I didn't even want to change them" she said walking away, "I'm taking a shower you finish!" she called back. Sonata shrugged, she changed Rainbow Dash then Pinkie, going down the line until only Sunset Shimmer and Fluttershy were all that was left.
As she came to get Shimmer Adagio said, "you change Fluttershy, I want this one" she said picking up Shimmer who was now worried about being chosen. They were carried out, and Fluttershy was careful to hold Twilight carefully like a doll while Shimmer just hugged on to Adagio her head on laying against her chest. "Soft, aren't they?" Adagio whispered to her causing Shimmer to blush.
Adagio smiled as she stood Shimmer up before reaching down and rubbing on Shimmer's clit and vagina for a short moment as Sonata and the others were unaware of her actions. "Is someone "wet"?" Adagio teased. Though the other girls all had their shirts taken away, Adagio let Shimmer keep her undergarments. She went on with the rest changed before putting the last girl into the playpen. "You all behave now, or you'll have to face punishments."
Aria came back in sighing, "stupid pink baby" she was grumbling to herself but then looked nervous when she saw Adagio's angry look.
"Where were you? I told you to help Sonata change them!" Adagio said as Aria pouted.
"I don't know why, when it comes to diapers Sonata is an expert" Aria teased again making Sonata huff.
"If that's what you think, then I understand why you wouldn't change their diapers" Adagio said calmly as she walked over putting her hands on Aria's shoulder.
"You do?" Aria said confused as she felt Adagio place her hand, gasping in surprise as she quickly removed her power gem, catching it. Aria whined, "hey give that back" but Adagio started glowing making Aria freeze for fear of magic being used against her.
"Now then, you're going to take off your clothes and lay on that table, or you'll spend the day as Sonata's doll" Aria winced then did as she was asked before hearing, "Sonata, be a good girl and change Aria will you" she said taking out a pull-up that barely fit her.
"Yes Ma'am!" she said playfully as she took the pull-ups. Walking over she said, "ooh you're a big baby, I might need more wet wipes" she teased Aria who rolled her eyes. Then winced gasping at how cold the wipes were, wondering how the girls put up with it. Sonata took extra time to thoroughly clean her making Aria blush before feeling her blow. Soon she was wearing the diaper as she got up. "There, happy?" Aria said to Adagio.
"Pleasant, now you're going to help Sonata teach the girls the new rules now that they live with us, fail and you'll be joining them" she threatened Aria who just turned to the girls.
"So, who's hungry?" as it was clear a few girls were giggling at her plight. Aria face palmed but rounded the girls up into a play pen, "Now you be good girls for Sonata and I'll make some dinner for all of you!" Adagio, grinned at this and walked away as she took her boots off. She kicked her feet up on the living room table and turned on the TV not paying attention to any of the other girls as she felt no threat could come of them.
Sonata just pouted, "Aria you don't know how to cook for bab-bies!" She seemed stern to her. Aria just rolled her eyes at the insult as she fought past the fact she only had a pull-up on.
"How hard could it be, you just throw a few sandwiches together." She suggested but Sonata seemed angry still.
"It's not that easy! They can't eat hard foods, you need to make something soft" she said before picking up Aria. This took Aria by surprise as without her pendant she didn't have increased strength like Sonata. She set her inside of the play pen, "Momma Aria will play with you girls until Dinner is ready. After that we'll be taking a nap"
Aria sighed before turning to the girls, "Just what am I gonna do with you now..."
Originally inspired by a friend, this was a fun project I'd written up. This is more or less the final product, and I'll be ending the story here. Though I would like to go on more, I feel it was a project too ambitious. I hope you enjoyed reading this, and thank you for your time.